Example usage for org.apache.zookeeper WatchedEvent getState

Introduction

In this page you can find the example usage for org.apache.zookeeper WatchedEvent getState.

Prototype

public KeeperState getState() 

Source Link

Usage

From source file:com.netflix.curator.BasicTests.java

License:Apache License

@Test
public void testExpiredSession() throws Exception {
    // see http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A4

    final Timing timing = new Timing();

    final CountDownLatch latch = new CountDownLatch(1);
    Watcher watcher = new Watcher() {
        @Override/*w w w .  j av a2 s . c  om*/
        public void process(WatchedEvent event) {
            if (event.getState() == Event.KeeperState.Expired) {
                latch.countDown();
            }
        }
    };

    final CuratorZookeeperClient client = new CuratorZookeeperClient(server.getConnectString(),
            timing.session(), timing.connection(), watcher, new RetryOneTime(2));
    client.start();
    try {
        final AtomicBoolean firstTime = new AtomicBoolean(true);
        RetryLoop.callWithRetry(client, new Callable<Object>() {
            @Override
            public Object call() throws Exception {
                if (firstTime.compareAndSet(true, false)) {
                    try {
                        client.getZooKeeper().create("/foo", new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE,
                                CreateMode.PERSISTENT);
                    } catch (KeeperException.NodeExistsException ignore) {
                        // ignore
                    }

                    KillSession.kill(client.getZooKeeper(), server.getConnectString());

                    Assert.assertTrue(timing.awaitLatch(latch));
                }
                ZooKeeper zooKeeper = client.getZooKeeper();
                client.blockUntilConnectedOrTimedOut();
                Assert.assertNotNull(zooKeeper.exists("/foo", false));
                return null;
            }
        });
    } finally {
        client.close();
    }
}

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From source file:com.netflix.curator.ConnectionState.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (LOG_EVENTS) {
        log.debug("ConnectState watcher: " + event);
    }/*w w w.  ja va2  s. c o m*/

    for (Watcher parentWatcher : parentWatchers) {
        TimeTrace timeTrace = new TimeTrace("connection-state-parent-process", tracer.get());
        parentWatcher.process(event);
        timeTrace.commit();
    }

    boolean wasConnected = isConnected.get();
    boolean newIsConnected = wasConnected;
    if (event.getType() == Watcher.Event.EventType.None) {
        newIsConnected = checkState(event.getState(), wasConnected);
    }

    if (newIsConnected != wasConnected) {
        isConnected.set(newIsConnected);
        connectionStartMs = System.currentTimeMillis();
    }
}

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From source file:com.netflix.curator.framework.imps.CuratorFrameworkImpl.java

License:Apache License

public CuratorFrameworkImpl(CuratorFrameworkFactory.Builder builder) {
    this.client = new CuratorZookeeperClient(builder.getZookeeperFactory(), builder.getEnsembleProvider(),
            builder.getSessionTimeoutMs(), builder.getConnectionTimeoutMs(), new Watcher() {
                @Override// ww w .j av  a  2 s  .co m
                public void process(WatchedEvent watchedEvent) {
                    CuratorEvent event = new CuratorEventImpl(CuratorFrameworkImpl.this,
                            CuratorEventType.WATCHED, watchedEvent.getState().getIntValue(),
                            unfixForNamespace(watchedEvent.getPath()), null, null, null, null, null,
                            watchedEvent, null);
                    processEvent(event);
                }
            }, builder.getRetryPolicy());

    listeners = new ListenerContainer<CuratorListener>();
    unhandledErrorListeners = new ListenerContainer<UnhandledErrorListener>();
    backgroundOperations = new DelayQueue<OperationAndData<?>>();
    namespace = new NamespaceImpl(this, builder.getNamespace());
    threadFactory = getThreadFactory(builder);
    connectionStateManager = new ConnectionStateManager(this, builder.getThreadFactory());
    compressionProvider = builder.getCompressionProvider();
    aclProvider = builder.getAclProvider();
    namespaceFacadeCache = new NamespaceFacadeCache(this);

    byte[] builderDefaultData = builder.getDefaultData();
    defaultData = (builderDefaultData != null) ? Arrays.copyOf(builderDefaultData, builderDefaultData.length)
            : new byte[0];

    if (builder.getAuthScheme() != null) {
        authInfo.set(new AuthInfo(builder.getAuthScheme(), builder.getAuthValue()));
    }

    failedDeleteManager = new FailedDeleteManager(this);
}

---

From source file:com.netflix.curator.framework.imps.NamespaceWatchedEvent.java

License:Apache License

NamespaceWatchedEvent(CuratorFrameworkImpl client, WatchedEvent event) {
    super(event.getType(), event.getState(), client.unfixForNamespace(event.getPath()));
}

---

From source file:com.netflix.curator.framework.imps.TestFrameworkEdges.java

License:Apache License

@Test
public void testSessionKilled() throws Exception {
    CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
    client.start();// w  w w .j a v  a 2s. c  o m
    try {
        client.create().forPath("/sessionTest");

        final AtomicBoolean sessionDied = new AtomicBoolean(false);
        Watcher watcher = new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                if (event.getState() == Event.KeeperState.Expired) {
                    sessionDied.set(true);
                }
            }
        };
        client.checkExists().usingWatcher(watcher).forPath("/sessionTest");
        KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
        Assert.assertNotNull(client.checkExists().forPath("/sessionTest"));
        Assert.assertTrue(sessionDied.get());
    } finally {
        client.close();
    }
}

---

From source file:com.netflix.curator.test.KillSession.java

License:Apache License

/**
 * Kill the given ZK session//  w w w.  j a  v a 2s .  co m
 *
 * @param client the client to kill
 * @param connectString server connection string
 * @param maxMs max time ms to wait for kill
 * @throws Exception errors
 */
public static void kill(ZooKeeper client, String connectString, int maxMs) throws Exception {
    long startTicks = System.currentTimeMillis();

    final CountDownLatch sessionLostLatch = new CountDownLatch(1);
    Watcher sessionLostWatch = new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            sessionLostLatch.countDown();
        }
    };
    client.exists("/___CURATOR_KILL_SESSION___" + System.nanoTime(), sessionLostWatch);

    final CountDownLatch connectionLatch = new CountDownLatch(1);
    Watcher connectionWatcher = new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            if (event.getState() == Event.KeeperState.SyncConnected) {
                connectionLatch.countDown();
            }
        }
    };
    ZooKeeper zk = new ZooKeeper(connectString, maxMs, connectionWatcher, client.getSessionId(),
            client.getSessionPasswd());
    try {
        if (!connectionLatch.await(maxMs, TimeUnit.MILLISECONDS)) {
            throw new Exception("KillSession could not establish duplicate session");
        }
        try {
            zk.close();
        } finally {
            zk = null;
        }

        while (client.getState().isConnected() && !sessionLostLatch.await(100, TimeUnit.MILLISECONDS)) {
            long elapsed = System.currentTimeMillis() - startTicks;
            if (elapsed > maxMs) {
                throw new Exception("KillSession timed out waiting for session to expire");
            }
        }
    } finally {
        if (zk != null) {
            zk.close();
        }
    }
}

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From source file:com.ngdata.hbaseindexer.indexer.IndexerIT.java

License:Apache License

private void cleanZooKeeper(String zkConnectString, String rootToDelete) throws Exception {
    int sessionTimeout = 10000;

    ZooKeeper zk = new ZooKeeper(zkConnectString, sessionTimeout, new Watcher() {
        @Override//w w  w  . j a  va 2s.c  o  m
        public void process(WatchedEvent event) {
            if (event.getState() == Watcher.Event.KeeperState.Disconnected) {
                System.err.println("ZooKeeper Disconnected.");
            } else if (event.getState() == Event.KeeperState.Expired) {
                System.err.println("ZooKeeper session expired.");
            }
        }
    });

    long waitUntil = System.currentTimeMillis() + sessionTimeout;
    while (zk.getState() != CONNECTED && waitUntil > System.currentTimeMillis()) {
        try {
            Thread.sleep(20);
        } catch (InterruptedException e) {
            break;
        }
    }

    if (zk.getState() != CONNECTED) {
        throw new RuntimeException("Failed to connect to ZK within " + sessionTimeout + "ms.");
    }

    if (zk.exists(rootToDelete, false) != null) {
        List<String> paths = new ArrayList<String>();
        collectChildren(rootToDelete, zk, paths);
        paths.add(rootToDelete);

        for (String path : paths) {
            zk.delete(path, -1, null, null);
        }

        // The above deletes are async, wait for them to be finished
        long startWait = System.currentTimeMillis();
        while (zk.exists(rootToDelete, null) != null) {
            Thread.sleep(5);

            if (System.currentTimeMillis() - startWait > 120000) {
                throw new RuntimeException("State was not cleared in ZK within the expected timeout");
            }
        }
    }

    zk.close();
}

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From source file:com.ngdata.sep.util.zookeeper.ZooKeeperImpl.java

License:Apache License

protected void setConnectedState(WatchedEvent event) {
    if (event.getState() == Watcher.Event.KeeperState.SyncConnected) {
        synchronized (connectedMonitor) {
            if (!connected) {
                connected = true;/* w  w w.  ja v a2 s.  c o m*/
                connectedMonitor.notifyAll();
            }
        }
    } else if (event.getState() == Watcher.Event.KeeperState.Disconnected
            || event.getState() == Watcher.Event.KeeperState.Expired) {
        synchronized (connectedMonitor) {
            if (connected) {
                connected = false;
                connectedMonitor.notifyAll();
            }
        }
    }
}

---

From source file:com.objectdriven.maven.zookeeper.sample.DataMonitor.java

public void process(WatchedEvent event) {
    String path = event.getPath();
    if (event.getType() == Event.EventType.None) {
        // We are are being told that the state of the
        // connection has changed
        switch (event.getState()) {
        case SyncConnected:
            // In this particular example we don't need to do anything
            // here - watches are automatically re-registered with
            // server and any watches triggered while the client was
            // disconnected will be delivered (in order of course)
            break;
        case Expired:
            // It's all over
            dead = true;//from w w w . j a v a 2s.  c  om
            listener.closing(KeeperException.Code.SessionExpired);
            break;
        }
    } else {
        if (path != null && path.equals(znode)) {
            // Something has changed on the node, let's find out
            zk.exists(znode, true, this, null);
        }
    }
    if (chainedWatcher != null) {
        chainedWatcher.process(event);
    }
}

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From source file:com.oneapm.base.tools.ZookeeperClient.java

/**
 * ??,?//w w  w.  j av  a2  s. co m
 *
 * @param event
 */
@Override
public void process(WatchedEvent event) {
    LOG.info("" + event.getState());
    if (event.getType() == Event.EventType.NodeDataChanged && event.getPath().equals("/ni/caution")) {
        setRules(event.getPath());
    }
    if (event.getType() == Event.EventType.NodeDataChanged && event.getPath().equals("/ni/license")) {
        setLicense(event.getPath());
    }
}

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